# Define here the models for your spider middleware
#
# See documentation in:
# https://docs.scrapy.org/en/latest/topics/spider-middleware.html

from scrapy import signals
from scrapy.http import HtmlResponse
from selenium import webdriver
from selenium.webdriver.common.by import By
import time

# useful for handling different item types with a single interface
from itemadapter import is_item, ItemAdapter


class SportsPunchPhotosSpiderMiddleware:
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the spider middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_spider_input(self, response, spider):
        # Called for each response that goes through the spider
        # middleware and into the spider.

        # Should return None or raise an exception.
        return None

    def process_spider_output(self, response, result, spider):
        # Called with the results returned from the Spider, after
        # it has processed the response.

        # Must return an iterable of Request, or item objects.
        for i in result:
            yield i

    def process_spider_exception(self, response, exception, spider):
        # Called when a spider or process_spider_input() method
        # (from other spider middleware) raises an exception.

        # Should return either None or an iterable of Request or item objects.
        pass

    def process_start_requests(self, start_requests, spider):
        # Called with the start requests of the spider, and works
        # similarly to the process_spider_output() method, except
        # that it doesn’t have a response associated.

        # Must return only requests (not items).
        for r in start_requests:
            yield r

    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)


class SportsPunchPhotosDownloaderMiddleware:
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the downloader middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_request(self, request, spider):
        # Called for each request that goes through the downloader
        # middleware.

        # Must either:
        # - return None: continue processing this request
        # - or return a Response object
        # - or return a Request object
        # - or raise IgnoreRequest: process_exception() methods of
        #   installed downloader middleware will be called

        # 输入统一认证码及密码进行登陆
        self.username = input("[INFO] 请输入统一认证码：")
        self.password = input("[INFO] 请输入密码：")
        self.opt = webdriver.ChromeOptions()
        self.opt.add_argument("headless")
        self.browser = webdriver.Chrome(executable_path = "/Users/liuyuanxi/Sports_Punch_Photos/chromedriver",
                                        chrome_options = self.opt)
        self.browser.maximize_window()
        self.browser.get(request.url)
        # 登陆账号
        self.browser.find_element(By.XPATH, "//input[@id='username']").send_keys(self.username)
        self.browser.find_element(By.XPATH, "//input[@id='password']").send_keys(self.password)
        self.browser.find_element(By.XPATH, "//a[@id='login_submit']").click()
        time.sleep(1)
        self.browser.find_element(By.XPATH, "//*[@id='side-menu']/li[5]/a/span[1]").click()
        self.browser.find_element(By.XPATH, "//*[@id='side-menu']/li[5]/ul/li[1]/a").click()
        # 对 iframe 部分的解析
        self.browser.switch_to.frame(self.browser.find_element(By.CSS_SELECTOR, "iframe[name='iframe3']"))
        time.sleep(1)
        self.body = self.browser.page_source.encode("UTF-8")
        self.url = self.browser.current_url
        # 保存当前 Cookie
        self.cookie = [self.cookie_item["name"] + "=" + self.cookie_item["value"] for
                       self.cookie_item in self.browser.get_cookies()]
        self.cookiestr = "; ".join(self.cookie_item1 for self.cookie_item1 in self.cookie)
        self.cookiestr = bytes(self.cookiestr, encoding = "UTF-8")
        with open("cookie.txt", "wb") as cookief:
            cookief.write(self.cookiestr)
        self.browser.close()
        return HtmlResponse(url = self.url, body = self.body, encoding = "UTF-8", request = request, status = 200)

    def process_response(self, request, response, spider):
        # Called with the response returned from the downloader.

        # Must either;
        # - return a Response object
        # - return a Request object
        # - or raise IgnoreRequest
        return response

    def process_exception(self, request, exception, spider):
        # Called when a download handler or a process_request()
        # (from other downloader middleware) raises an exception.

        # Must either:
        # - return None: continue processing this exception
        # - return a Response object: stops process_exception() chain
        # - return a Request object: stops process_exception() chain
        pass

    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)
